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Step 1 · Inspect and Prepare the Rough Opening

Examine the rough opening carefully. Check for any rot, damage, or obstructions. Use a level to ensure the opening is plumb and level. Remove any old caulk, nails, staples, or wood fragments. Measure the width, height, and diagonal of the opening to confirm it is square and matches the dimensions required for the new window. A properly prepared opening is crucial for a good fit and seal.

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Step 1 · Inspect and Prepare the Rough Opening

Examine the rough opening carefully. Check for any rot, damage, or obstructions. Use a level to ensure the opening is plumb and level. Remove any old caulk, nails, staples, or wood fragments. Measure the width, height, and diagonal of the opening to confirm it is square and matches the dimensions required for the new window. A properly prepared opening is crucial for a good fit and seal.

Videos for this step

Prepare Rough OpeningPrepare the Window OpeningMeasure Window Opening

Tools and Materials

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Window Installation

Step 1 of 8·3.8 hr left

1
Inspect and Prepare the Rough Opening
30 minutes6 items
2
Apply Flashing Tape to Sill
15 minutes3 items
3
Apply Flashing Tape to Jambs and Head
20 minutes3 items
4
Position and Set the Window
25 minutes4 items
5
Shim and Level the Window
40 minutes6 items
6
Fasten the Window Frame
30 minutes4 items
7
Install Remaining Flashing and Sealant
25 minutes5 items
8
Install Interior Trim and Finish
45 minutes8 items
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